37 lines
825 B
Go
37 lines
825 B
Go
package oauth1
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
)
|
|
|
|
// PercentEncode percent encodes a string according to RFC 3986 2.1.
|
|
func PercentEncode(input string) string {
|
|
var buf bytes.Buffer
|
|
for _, b := range []byte(input) {
|
|
// if in unreserved set
|
|
if shouldEscape(b) {
|
|
buf.Write([]byte(fmt.Sprintf("%%%02X", b)))
|
|
} else {
|
|
// do not escape, write byte as-is
|
|
buf.WriteByte(b)
|
|
}
|
|
}
|
|
return buf.String()
|
|
}
|
|
|
|
// shouldEscape returns false if the byte is an unreserved character that
|
|
// should not be escaped and true otherwise, according to RFC 3986 2.1.
|
|
func shouldEscape(c byte) bool {
|
|
// RFC3986 2.3 unreserved characters
|
|
if 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' {
|
|
return false
|
|
}
|
|
switch c {
|
|
case '-', '.', '_', '~':
|
|
return false
|
|
}
|
|
// all other bytes must be escaped
|
|
return true
|
|
}
|